You could just telnet to port 25 by hand and execture the series of
commands that the server is having a problem with, and cut/paste or log
a transcript thereof..
Ive run a simple session below. It doesnt seem from a first look that
they have a problem with multiple RCPT TO: (although it does appear
that they might be an open relay... ) If you have an address that is
valid for this host, we could try an actual delivery..
# telnet mfsmax.docomo.ne.jp 25
Trying 210.153.85.215...
Connected to mfsmax.docomo.ne.jp.
Escape character is '^]'.
220 mfsmax.docomo.ne.jp Sendmail GRIMM Service Ready
helo blah
250 Requested mail action okay, completed
mail from: random@???
250 Requested mail action okay, completed
rcpt to: postmaster@???
550 Unknown user postmaster@???
rcpt to: random@???
250 Requested mail action okay, completed
rcpt to: random2@???
250 Requested mail action okay, completed
rset
250 Requested mail action okay, completed
quit
221 service closing termination
Connection closed by foreign host.
On Fri, 8 Sep 2000, Christian Balzer wrote:
>
> Hello,
>
> I'm in the process of deploying a complete new mail system
> based purely on Exim with LDAP support for about 30000 users.
> For those with performance number fetish, it can receive about
> 1000 mails/minute while being 50% idle. Since the current setup
> has everything in duplicate that's actually 2000 mails/min.
>
> The first part of this system to be subjected to real life tests
> are the outbound SMTP servers, active since yesterday. All works
> as expected, with one exception.
>
> The MTA of a major mobile phone company is smoking bad crack and gives a
>
> SMTP error from remote mailer after initial connection:
> host mfsmax.docomo.ne.jp [210.153.85.216]:
> 503 Bad sequence of command
>
> to most (but not all!) mails send to it.
> I use queue_smtp_domains = "*" and a queue-runner every minute and
> my suspicion is that they don't handle multiple mails in one
> session well over there.
>
> Now while I know that Exim is doing the right thing and they're not
> (simply proven by the fact that 3000 other MTAs didn't have an issue
> and the interesting fact that postmaster@??? does not exist)
> I would like to prove it to them (if I ever find I way to contact them)
> and my management.
> Is there a way to log/report _outgoing_ SMTP dialogue within Exim?
> Inbound I can find options for, but not outbound.
>
> Dewa mata,
>
> <CB>
>
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